ML20097H158
| ML20097H158 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 05/29/1992 |
| From: | Thompson F Public Service Enterprise Group |
| To: | NRC |
| References | |
| REF-PT21-92 NUDOCS 9206240232 | |
| Download: ML20097H158 (3) | |
Text
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LICENSING & REGULATION NUCtfAM DEPAATWRNT LAR TELEcopy # (sog) 339,344, VERIFK:AlloN # (609) 33912sa 339 1241 33 S1464 33 &1212 Number of Pages (including cover sheet) 1 Date thu rr stet i
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Initial 10CFR21 Motification concerning C.11. Battla Actuatoru Unod at Public Service Electriu and Gan company, Hopo crook cenerating station l
PSE&G Supplier source Surveillance Report VS-92-021 was issued to docuront the results of the functionni tenting and final i
innpoetion of G.!!. Bottin actuators to bo utilized on Containment Atnonpheric control valvon (PSE&c tag numbern Ics-HV-11541, 4950, 4964, 4PC2 and S029).
Those valvos provide a containmnnt
- 4952, isolation function following a denign basis accident.
during the next Hope Creek outage.)noted that thenn valven are curre (1t is runctional tooting was performed to verify that all actuators failed closnd when the nolenoid was doenergitod, full closed position in less 1.han i seconds Vith various airand that all preneures applied.
completed for three of the actuators.A 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> hydra,ulic leak tout van also to satisfy the tent acceptanco crit.eria.All actuatorn vore found Howevor, during tasting it was noted that one pilot valve operated erratically when thn actuator cycled to the fail closed position.
The cause of this erratio operation van found to bo the presence of pipe dopo in the pilot valve as well as inside thn actuator cylinder on the pinton near the inlet port.
dope was used during the assembly process.
Pipe the excess pipe dopo in the pliot valve performed by G.u. nottiuA partial cleaning dope was the cause of the nrratic operation.allovod the devico to f Pipo dope was identified in the pilot valvo as well an insido tho actuator cylinder.
All actuator unito vero dinassemblud, cienned, renouembled and leak tested (manual overrido) in accordance with thu test plan and found to be acenptable, 0. 11. Bettis Corporation completed an ovaluation of all six actuators.
confirmed the prosence of pipe dope.The pilot valvo manufacturor, Autom preconce of pipe dopo in 3 of the six units.ASCO also confirmed the How replacement solenoid valvos will be provided upon ASCO's recommendation.
Automatic Valve is rabuilding the pilot valvos and cortifying thom an new.
The PSE&G varirind the actuators' functional acceptanco tent performed prior to release ability to perform their intended design function in accordan00 Vith purchase ordur P1-381331 although one valvo on an actuator did operate erratically.
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PSEMi LIC t Rirr4 NRC OITRATIONS C1R. :# 3/ 3 nrratio operation renulting from the presence of pipa do The root cause of this concern van determined to be lack of procedural controla during the nanufacturing process and inadoquato traintny of 0.11. Bettis personnel.
G. ll. Bettis i
i personnel used an excousivo amount of pipa dope during the assembly of the actuatoro, which resulted in tho introduction of the contaminants into the valven.
i controlled by any assembly procedurou.This activity was not In addition, during testing that the control air that was uand to operato theit was noted valvos was not filterad to trap any contaminants particles) in excess of 50 microns an required in(the Ascooil, water, assembly instructions.
into the valves.
This could also introduce contaminants NUREG 1275, Volumo 6 addresses the une of Loctito materials and other potential ecntaminants that may cauan this kind of crratic operation or failure.
idontified as a result of the introduction of contaminant uan of pipo dopo as a sealant may also contribute to sial The witnansed dur3ng the functionti tcot; G.H. Bottin' roview did not :1dentify any previous instances of arratic operation or s.alfunction of their actuators duo to the presenco of pipo dope.
However, the long term operability of theno valven, based on the past operating experiences documented in NUREG-1275.
significantly affected.
could bo the presunce of pipo dope a substantial natety he ard may beSho croated by loss of containment isolation function following a DBA.
Theroforo, 10CFR21 this innue in considered reportable pursuant to C.H.
installation at tho buttorfly valvo manufacturerBottin has ordered (Westmont, IL).
, C&S Valvo functionally tested prior to shipment to pSE&G.Upon assembly, tho butt
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w P. X. Thomson Manager a Licensing ar.d Regulation l
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